Means for transmitting motion.



UNITED STATES PATENT OFFICE.

BORIS LOUTZKY, OF BERLIN, GERMANY.

MEANS FOR TRANSMITTING MOTION.

SPECIFICATION forming part of Letters Patent No. 637,515, dated November21, 1899.

Application filed .Tune 2,1899. Serial No. 719,081. (No model.)

T0 all whom it may concern:

Be it known that I, BORIS LOUTZKY, a subj ect of the Emperor of Russia,residing at Berl'i'n, Germany, have invented certain new and usefulImprovements in Means for Transmitting Motion, of which the following isa full, clear, and exact description, reference being had to theaccompanying drawing, forming part hereof.

The figure of the drawing is a plan view, partly in section, of asuflicient number of parts to illustrate my invention.

In motors wherein great velocity is imparted to the main shaft it isadvantageous to give at least to the crank-piu a hardened wearingsurfacein order to reduce the wear of the same to the smallest extent. As thesaid shaft as a rule is provided with portions extending at rightangles, it is obvious in order to allow the pressure exerted on thecrankpins to be distributed on the ends of journals ct and b in such away as to favorably load the shaft the hardening of the pins can only beundertaken with considerable difficulty on account of the possibility ofwarping the shafts, and thereby altering the axial position Yof theshaft ends or journals.

This invention, which is shown in the accompanying drawing, has for itsobject to remove this drawback and to form such a shaft of separateparts in such a -manner as to obtain an absolutely solid connectionbetween the hardened crank-pins l and the two sections 2 and 3 of theshaft, which lie axially to one another and parallel with the pin 1, aswill hereinafter appear. The pin 1 is preferably formed in one piecewith the arm 5 and when turned down is hardened and ground along thefull extent of its wearing-surface, The tapered end c is then fitted inthe other part of the crank which has remained soft and which is boredexactly parallel to the crankpin, and the connection between the sectionof the shaft 2 and the arm 5 is effected by means of wedges and screws.The fly-wheel 4, which is preferably of cast-iron is employed as meansof connection between the pin 1 and the section 3 of the shaft.

The main difculty consists in uniting the shaft-section 3 withsufficient firmness to the tapering end e of the pin 1. In rapid-runningmachines, more particularly on fourstroke explosion-motors, the directattachment in the cast-iron body is never sufficient. The pin, evenwhere a wedge and screwing are both employed, soon becomes loose,so thatby mutual warping or a displacement of the sections 2 and 3 of the shaftthe machine may come to a standstill. In order to remove this drawback,the parts are mounted in the manner hereinbefore described, and a steelbush 6 is let into the body of the wheel 4 at the lpoint of attachmentand is firmly keyed thereto. This bush is very suitable, by reason ofits somewhat considerable diameter, for receiving the high pressure orstrain without damage to the fastening and to convey the same to theboring in the much softer castiron. By reason of the greater hardness ofthe bush it is better suited to render possible a secure holding of theend e of the crankpin 1 in the tapering bore of said bush.

Having now particularly described and ascertained the nature of the saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- In a device for transmitting motion, the lcombinationof a shaft made up of a plurality of sections, an arm carried by one ofsaid sections, a hardened tapering crank-pin carried by said arm, aiiy-wheel carried by another section of said shaft and having anaperture and a hardened bushing seated in said aperture, which bushingis adapted to receive the tapering end of the pin to connect theshaft-sections.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

BORIS LOUTZKY.

Witnesses:

HENRY HAsrER, WALDEMAE HAUPT.

